Sun Microsystems SPARCstation 10SX User Manual

Appendix B Functional Description 203
FIGURE B-4 MACIO ASIC Functional Block Diagram
SBus-to-External Bus Interface
The SBus-to-external bus interface (SEC) ASIC provides the interface between the
SBus and the external bus. The external bus connects to the following:
■ Serial port chips (2)
■ Audio chip
■ Diskette drive controller
■ 4-Mbit EEPROM
■ NVRAM/TOD chip
■ LED interface
One of the serial port chips provides serial ports A and B. The second serial port
chip provides the keyboard and mouse port. Line drivers interface the two serial
port chips to the serial ports.
FIGURE B-5 illustrates a functional block diagram of the
SEC ASIC.
DMA
LANCE
Parallel
port
SCSI
Fast
SCSI
controller
AUI
TPE
Clock
chip
Parallel
port
SBus
MACIO ASIC

Sun Microsystems SPARCstation 10SX Specifications

General

Brand	Sun Microsystems
Model	SPARCstation 10SX
Category	Desktop
Language	English